Alcoa operates close to the Munda Biddi Trail between Dwellingup and Collie, with  bauxite mines at Huntly and Willowdale and alumina refineries at Kwinana, Pinjarra and Wagerup.The company's bauxite production in WA accounts for around one-third of global supplies. It is committed to sustainable development and for over 50 years, Alcoa has played an important role in adding value to the communities in which they operate. It has supported the Munda Biddi Trail Foundation since its inception. Through a company-sponsored program, Alcoa employees volunteer to help maintain the Trail.